/*****************************************************************************
 * Copyright (c) 2009 CEA LIST & LIFL 
 *
 *    
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *  Cedric Dumoulin  Cedric.dumoulin@lifl.fr - Initial API and implementation
 *
 *****************************************************************************/
package org.eclipse.papyrus.example.core.sashwindows.simpleeditor.editors;

import org.eclipse.jface.action.*;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.ui.IActionBars;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchActionConstants;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.ide.IDEActionFactory;
import org.eclipse.ui.part.MultiPageEditorActionBarContributor;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.ui.texteditor.ITextEditorActionConstants;

/**
 * Manages the installation/deinstallation of global actions for multi-page editors.
 * Responsible for the redirection of global actions to the active editor.
 * Multi-page contributor replaces the contributors for the individual editors in the multi-page editor.
 */
public class MultiPageEditorContributor extends MultiPageEditorActionBarContributor {

	private IEditorPart activeEditorPart;

	private Action sampleAction;

	/**
	 * Creates a multi-page contributor.
	 */
	public MultiPageEditorContributor() {
		super();
		createActions();
	}

	/**
	 * Returns the action registed with the given text editor.
	 * 
	 * @return IAction or null if editor is null.
	 */
	protected IAction getAction(ITextEditor editor, String actionID) {
		return (editor == null ? null : editor.getAction(actionID));
	}

	/*
	 * (non-JavaDoc)
	 * Method declared in AbstractMultiPageEditorActionBarContributor.
	 */

	public void setActivePage(IEditorPart part) {
		if(activeEditorPart == part)
			return;

		activeEditorPart = part;

		IActionBars actionBars = getActionBars();
		if(actionBars != null) {

			ITextEditor editor = (part instanceof ITextEditor) ? (ITextEditor)part : null;

			actionBars.setGlobalActionHandler(
					ActionFactory.DELETE.getId(),
					getAction(editor, ITextEditorActionConstants.DELETE));
			actionBars.setGlobalActionHandler(
					ActionFactory.UNDO.getId(),
					getAction(editor, ITextEditorActionConstants.UNDO));
			actionBars.setGlobalActionHandler(
					ActionFactory.REDO.getId(),
					getAction(editor, ITextEditorActionConstants.REDO));
			actionBars.setGlobalActionHandler(
					ActionFactory.CUT.getId(),
					getAction(editor, ITextEditorActionConstants.CUT));
			actionBars.setGlobalActionHandler(
					ActionFactory.COPY.getId(),
					getAction(editor, ITextEditorActionConstants.COPY));
			actionBars.setGlobalActionHandler(
					ActionFactory.PASTE.getId(),
					getAction(editor, ITextEditorActionConstants.PASTE));
			actionBars.setGlobalActionHandler(
					ActionFactory.SELECT_ALL.getId(),
					getAction(editor, ITextEditorActionConstants.SELECT_ALL));
			actionBars.setGlobalActionHandler(
					ActionFactory.FIND.getId(),
					getAction(editor, ITextEditorActionConstants.FIND));
			actionBars.setGlobalActionHandler(
					IDEActionFactory.BOOKMARK.getId(),
					getAction(editor, IDEActionFactory.BOOKMARK.getId()));
			actionBars.updateActionBars();
		}
	}

	private void createActions() {
		sampleAction = new Action() {

			public void run() {
				MessageDialog.openInformation(null, "Core Plug-in", "Sample Action Executed");
			}
		};
		sampleAction.setText("Sample Action");
		sampleAction.setToolTipText("Sample Action tool tip");
		sampleAction.setImageDescriptor(PlatformUI.getWorkbench().getSharedImages().
				getImageDescriptor(IDE.SharedImages.IMG_OBJS_TASK_TSK));
	}

	public void contributeToMenu(IMenuManager manager) {
		IMenuManager menu = new MenuManager("Editor &Menu");
		manager.prependToGroup(IWorkbenchActionConstants.MB_ADDITIONS, menu);
		menu.add(sampleAction);
	}

	public void contributeToToolBar(IToolBarManager manager) {
		manager.add(new Separator());
		manager.add(sampleAction);
	}
}
